def __init__(
self,
size,
self_attn,
src_attn,
feed_forward,
dropout_rate,
normalize_before=True,
concat_after=False,
):
"""Construct an DecoderLayer object."""
super(DecoderLayer, self).__init__()
self.size = size
self.self_attn = self_attn
self.src_attn = src_attn
self.feed_forward = feed_forward
self.norm1 = LayerNorm(size)
self.norm2 = LayerNorm(size)
self.norm3 = LayerNorm(size)
self.dropout = nn.Dropout(dropout_rate)
self.normalize_before = normalize_before
self.concat_after = concat_after
if self.concat_after:
self.concat_linear1 = nn.Linear(size + size, size)
self.concat_linear2 = nn.Linear(size + size, size)
def __init__(self, state_dim, action_dim,
hidden_dim, output_dim, use_layer_norm=False):
super(Critic, self).__init__()
self.state_dim = state_dim
self.action_dim = action_dim
self.hidden = hidden_dim
self.output_dim = output_dim
self.use_layer_norm = use_layer_norm
# Architecture
self.input = nn.Linear(in_features=self.state_dim+self.action_dim, out_features=self.hidden)
self.hidden_1 = nn.Linear(in_features=self.hidden, out_features=self.hidden*2)
self.hidden_2 = nn.Linear(in_features=self.hidden*2, out_features=self.hidden*2)
self.output = nn.Linear(in_features=self.hidden*2, out_features=self.output_dim)
if self.use_layer_norm:
self.ln1 = LayerNorm(self.hidden)
self.ln2 = LayerNorm(self.hidden*2)
self.ln3 = LayerNorm(self.hidden*2)
# Leaky Relu activation
self.lrelu = nn.LeakyReLU()
# Initialize the weights with xavier initialization
nn.init.xavier_uniform_(self.input.weight)
nn.init.xavier_uniform_(self.hidden_1.weight)
nn.init.xavier_uniform_(self.hidden_2.weight)
nn.init.xavier_uniform_(self.output.weight)
def __init__(
self,
size,
self_attn,
feed_forward,
feed_forward_macaron,
conv_module,
dropout_rate,
normalize_before=True,
concat_after=False,
):
"""Construct an EncoderLayer object."""
super(EncoderLayer, self).__init__()
self.self_attn = self_attn
self.feed_forward = feed_forward
self.feed_forward_macaron = feed_forward_macaron
self.conv_module = conv_module
self.norm_ff = LayerNorm(size) # for the FNN module
self.norm_mha = LayerNorm(size) # for the MHA module
if feed_forward_macaron is not None:
self.norm_ff_macaron = LayerNorm(size)
self.ff_scale = 0.5
else:
self.ff_scale = 1.0
if self.conv_module is not None:
self.norm_conv = LayerNorm(size) # for the CNN module
self.norm_final = LayerNorm(
size) # for the final output of the block
self.dropout = nn.Dropout(dropout_rate)
self.size = size
self.normalize_before = normalize_before
self.concat_after = concat_after
if self.concat_after:
self.concat_linear = nn.Linear(size + size, size)
def __init__(
self,
size,
self_attn,
feed_forward,
dropout_rate,
normalize_before=True,
concat_after=False,
):
super(EncoderLayer, self).__init__()
self.self_attn = self_attn
self.feed_forward = feed_forward
self.norm1 = LayerNorm(size)
self.norm2 = LayerNorm(size)
self.dropout = nn.Dropout(dropout_rate)
self.size = size
self.normalize_before = normalize_before
self.concat_after = concat_after
if self.concat_after:
self.concat_linear = nn.Linear(size + size, size)
def __init__(self, state_dim, action_dim,
hidden_dim, use_tanh=False,
use_sigmoid=False, deterministic=False, use_layernorm=False):
super(StochasticActor, self).__init__()
self.state_dim = state_dim
self.action_dim = action_dim
self.hidden = hidden_dim
self.use_tanh = use_tanh
self.use_sigmoid = use_sigmoid
self.deterministic = deterministic
self.use_layernorm = use_layernorm
# Architecture
self.input = nn.Linear(in_features=self.state_dim, out_features=self.hidden)
self.hidden_1 = nn.Linear(in_features=self.hidden, out_features=self.hidden*2)
self.hidden_2 = nn.Linear(in_features=self.hidden*2, out_features=self.hidden*2)
self.output_mu = nn.Linear(in_features=self.hidden*2, out_features=self.action_dim)
self.output_logstd = nn.Linear(in_features=self.hidden*2, out_features=self.action_dim)
if self.use_layernorm:
self.ln1 = LayerNorm(self.hidden)
self.ln2 = LayerNorm(self.hidden*2)
self.ln3 = LayerNorm(self.hidden*2)
# Leaky Relu activation function
self.lrelu = nn.LeakyReLU()
#Output Activation function
self.tanh = nn.Tanh()
# Output Activation sigmoid function
self.sigmoid = nn.Sigmoid()
# Initialize the weights with xavier initialization
nn.init.xavier_uniform_(self.input.weight)
nn.init.xavier_uniform_(self.hidden_1.weight)
nn.init.xavier_uniform_(self.hidden_2.weight)
nn.init.xavier_uniform_(self.output_mu.weight)
nn.init.xavier_uniform_(self.output_logstd.weight)
def __init__(self,
idim,
selfattention_layer_type="selfattn",
attention_dim=256,
attention_heads=4,
linear_units=2048,
num_blocks=6,
dropout_rate=0.1,
positional_dropout_rate=0.1,
attention_dropout_rate=0.0,
input_layer="conv2d",
pos_enc_class=PositionalEncoding,
normalize_before=True,
concat_after=False,
positionwise_layer_type="linear",
positionwise_conv_kernel_size=1):
super(Encoder, self).__init__()
self.conv_subsampling_factor = 1
self.embed = torch.nn.Sequential(
input_layer,
pos_enc_class(attention_dim, positional_dropout_rate),
)
self.normalize_before = normalize_before
positionwise_layer, positionwise_layer_args = self.get_positionwise_layer(
positionwise_layer_type,
attention_dim,
linear_units,
dropout_rate,
positionwise_conv_kernel_size,
)
self.encoders = repeat(
num_blocks,
lambda lnum: EncoderLayer(
attention_dim,
MultiHeadedAttention(attention_heads, attention_dim,
attention_dropout_rate),
positionwise_layer(*positionwise_layer_args),
dropout_rate,
normalize_before,
concat_after,
),
)
if self.normalize_before:
self.after_norm = LayerNorm(attention_dim)
def __init__(self, idim, n_layers=2, n_chans=384, kernel_size=3, bias=True, dropout_rate=0.5, ):
"""
Initilize duration predictor module.
Args:
idim (int): Input dimension.
n_layers (int, optional): Number of convolutional layers.
n_chans (int, optional): Number of channels of convolutional layers.
kernel_size (int, optional): Kernel size of convolutional layers.
dropout_rate (float, optional): Dropout rate.
"""
super().__init__()
self.conv = torch.nn.ModuleList()
for idx in range(n_layers):
in_chans = idim if idx == 0 else n_chans
self.conv += [
torch.nn.Sequential(torch.nn.Conv1d(in_chans, n_chans, kernel_size, stride=1, padding=(kernel_size - 1) // 2, bias=bias, ), torch.nn.ReLU(),
LayerNorm(n_chans, dim=1), torch.nn.Dropout(dropout_rate), )]
self.linear = torch.nn.Linear(n_chans, 1)
def __init__(self,
idim,
n_layers=2,
n_chans=384,
kernel_size=3,
dropout_rate=0.1,
offset=1.0):
"""
Initialize duration predictor module.
Args:
idim (int): Input dimension.
n_layers (int, optional): Number of convolutional layers.
n_chans (int, optional): Number of channels of convolutional layers.
kernel_size (int, optional): Kernel size of convolutional layers.
dropout_rate (float, optional): Dropout rate.
offset (float, optional): Offset value to avoid nan in log domain.
"""
super(DurationPredictor, self).__init__()
self.offset = offset
self.conv = torch.nn.ModuleList()
for idx in range(n_layers):
in_chans = idim if idx == 0 else n_chans
self.conv += [
torch.nn.Sequential(
torch.nn.Conv1d(
in_chans,
n_chans,
kernel_size,
stride=1,
padding=(kernel_size - 1) // 2,
),
torch.nn.ReLU(),
LayerNorm(n_chans, dim=1),
torch.nn.Dropout(dropout_rate),
)
]
self.linear = torch.nn.Linear(n_chans, 1)
def __init__(
self,
odim,
selfattention_layer_type="selfattn",
attention_dim=256,
attention_heads=4,
conv_wshare=4,
conv_kernel_length=11,
conv_usebias=False,
linear_units=2048,
num_blocks=6,
dropout_rate=0.1,
positional_dropout_rate=0.1,
self_attention_dropout_rate=0.0,
src_attention_dropout_rate=0.0,
input_layer="embed",
use_output_layer=True,
pos_enc_class=PositionalEncoding,
normalize_before=True,
concat_after=False,
):
"""Construct an Decoder object."""
torch.nn.Module.__init__(self)
if input_layer == "embed":
self.embed = torch.nn.Sequential(
torch.nn.Embedding(odim, attention_dim),
pos_enc_class(attention_dim, positional_dropout_rate),
)
elif input_layer == "linear":
self.embed = torch.nn.Sequential(
torch.nn.Linear(odim, attention_dim),
torch.nn.LayerNorm(attention_dim),
torch.nn.Dropout(dropout_rate),
torch.nn.ReLU(),
pos_enc_class(attention_dim, positional_dropout_rate),
)
elif isinstance(input_layer, torch.nn.Module):
self.embed = torch.nn.Sequential(
input_layer, pos_enc_class(attention_dim, positional_dropout_rate)
)
else:
raise NotImplementedError("only `embed` or torch.nn.Module is supported.")
self.normalize_before = normalize_before
self.decoders = repeat(
num_blocks,
lambda lnum: DecoderLayer(
attention_dim,
MultiHeadedAttention(attention_heads, attention_dim, self_attention_dropout_rate),
MultiHeadedAttention(attention_heads, attention_dim, src_attention_dropout_rate),
PositionwiseFeedForward(attention_dim, linear_units, dropout_rate),
dropout_rate,
normalize_before,
concat_after,
),
)
self.selfattention_layer_type = selfattention_layer_type
if self.normalize_before:
self.after_norm = LayerNorm(attention_dim)
if use_output_layer:
self.output_layer = torch.nn.Linear(attention_dim, odim)
else:
self.output_layer = None
def __init__(self,
idim,
attention_dim=256,
attention_heads=4,
linear_units=2048,
num_blocks=6,
dropout_rate=0.1,
positional_dropout_rate=0.1,
attention_dropout_rate=0.0,
input_layer="conv2d",
normalize_before=True,
concat_after=False,
positionwise_conv_kernel_size=1,
macaron_style=False,
use_cnn_module=False,
cnn_module_kernel=31,
zero_triu=False):
"""Construct a Conformer object."""
super(Conformer, self).__init__()
activation = Swish()
self.conv_subsampling_factor = 1
if isinstance(input_layer, torch.nn.Module):
self.embed = torch.nn.Sequential(
input_layer,
RelPositionalEncoding(attention_dim, positional_dropout_rate),
)
elif input_layer is None:
self.embed = torch.nn.Sequential(
RelPositionalEncoding(attention_dim, positional_dropout_rate))
else:
raise ValueError("unknown input_layer: " + input_layer)
self.normalize_before = normalize_before
# self-attention module definition
encoder_selfattn_layer = RelPositionMultiHeadedAttention
encoder_selfattn_layer_args = (attention_heads, attention_dim,
attention_dropout_rate, zero_triu)
# feed-forward module definition
positionwise_layer = MultiLayeredConv1d
positionwise_layer_args = (
attention_dim,
linear_units,
positionwise_conv_kernel_size,
dropout_rate,
)
# convolution module definition
convolution_layer = ConvolutionModule
convolution_layer_args = (attention_dim, cnn_module_kernel, activation)
self.encoders = repeat(
num_blocks, lambda lnum: EncoderLayer(
attention_dim,
encoder_selfattn_layer(*encoder_selfattn_layer_args),
positionwise_layer(*positionwise_layer_args),
positionwise_layer(*positionwise_layer_args)
if macaron_style else None,
convolution_layer(*convolution_layer_args) if use_cnn_module
else None, dropout_rate, normalize_before, concat_after))
if self.normalize_before:
self.after_norm = LayerNorm(attention_dim)